Mechanical Behavior and Fracture Mechanism of Thermoplastic Composites with Commingled Yarn

Fujita, Akihiro; Maekawa, Zenichiro; Hamada, Hiroyuki; Matsuda, M.; Matsuo, Tatsuki

doi:10.1177/073168449301200203

Cited by 19 publications

(8 citation statements)

References 1 publication

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“…Due to the drapability of the fabric, a composite with a complex structure can be prepared by this method. However, because there are many resin‐rich areas inside the composite, the properties of the composites are usually poor. Hybrid yarns method The reinforcing fibers and the matrix fibers are intimately combined in different ways to form hybrid yarns, including commingled yarns, co‐wrapped yarns and core‐spun yarns. Commingled yarns are usually achieved by intimate mixing of fibers in a nozzle by means of pressurized air .…”

Section: Introductionmentioning

confidence: 99%

Study on mechanical properties of unidirectional continuous carbon fiber‐reinforced PEEK composites fabricated by the wrapped yarn method

Zhang

Gao

et al. 2017

Polymer Composites

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The purpose of this study was to investigate the mechanical properties of unidirectional continuous carbon fiber-reinforced PEEK (CCF/PEEK) composites via the wrapped yarn method and to obtain optimum fabrication conditions. The composite plates were fabricated at different processing conditions and their mechanical properties (i.e., tensile, bending and short beam shear strength performance) were investigated in terms of thermal and fracture morphology characterizations. As the molding temperature and molding time increased, the mechanical properties of the composites enhanced due to the improved impregnation of the fibers, although there was potential matrix degradation. Moreover, slow cooling rate had little effect on the mechanical properties of the composites. Therefore, to obtain a combination of excellent mechanical properties and high production efficiency, a relatively high molding temperature, sufficient molding time and moderate cooling rate were optimal for the CCF/PEEK fabricated by the wrapped yarn method. POLYM. COM-POS., 00:000-000, FABRICATIONMelt Spinning of PEEK Fiber grade PEEK particles (MI 5 22 g/10 min; T g 5 1458C; T m 5 3378C, were supplied by Changchun Jilin University Super Engineering Plastics Research Co. China and used for melt spinning. The details of melt spinning were previously reported [36]. The fabricated PEEK fibers had a linear density of 18 and 23 tex, and the average diameter of the monofilament was 23 lm and 36 filaments in number. The schematic diagram of the spinning machine is shown in Fig. 2. Co-Wrapped YarnsCo-wrapped yarns were fabricated by laboratoryassembled equipment, and the diagram is shown in Fig. 3. The device consists of three parts: the doubling device (Fig. 3a), the spooling device (Fig. 3b) and the cowrapping device (Fig. 3c). To fabricate co-wrapped yarns the required linear density of the PEEK yarns was obtained by the doubling process. To prepare a cowrapped yarn with a carbon fiber mass fraction of 60%, the line density of the PEEK yarns was 133 tex. Then, during the spooling process, the PEEK yarns were FIG. 2. Schematic diagram of the melt spinning machine. FIG. 3. Schematic diagram of a self-assembly device for preparing co-wrapped yarns: (a) doubling device; (b) spooling device; (c) co-wrapping device. [Color figure can be viewed at wileyonlinelibrary.com]

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Section: Introductionmentioning

confidence: 99%

Study on mechanical properties of unidirectional continuous carbon fiber‐reinforced PEEK composites fabricated by the wrapped yarn method

Zhang

Gao

et al. 2017

Polymer Composites

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“…The mechanical properties of thermoplastic flat knitted composites are not only dependent on the hybrid yarns used, but are also greatly affected by the knit structures as well as the orientation of the reinforcement yarns [16][17][18][19]. Knit fabrics could be reinforced by integrating the reinforcement yarns into the fabrics as knit loops, tuck stitches, weft and warp inlays or combinations of them.…”

Section: Introductionmentioning

confidence: 99%

High performance thermoplastic composite from flat knitted multi-layer textile preform using hybrid yarn

Abounaim

Diestel

offmann

et al. 2011

Composites Science and Technology

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Modern flat knitting machines using high performance yarns are able to knit fabrics including the reinforcement yarns arranged differently into knit structures. Due to their improved mechanical properties, composites made from multi-layer knit fabrics show great potential in lightweight applications. This paper reports on the development of flat knitted multi-layer textile preforms for high performance thermoplastic composites using hybrid yarns made of glass (GF) and polypropylene (PP) filaments. Such textile preforms with different reinforcements were used to consolidate into 2D thermoplastic composites. Moreover, the mechanical properties of these composites were studied.The mechanical properties of 2D composites were found to be greatly affected by different arrangements of reinforcement yarns. The integration of reinforcement yarns as biaxial inlays (warp and weft yarns) is found to be the best solution for knitting, whereas tuck stitch shaped and unidirectional arranged reinforcements offer also promising application possibilities.

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“…The potential applications of these composites are the light weight industries, especially in air and spacecrafts, transport vehicles, combat vehicles, lift cabins, mechanical engineering, architectural designs, marine applications and infrastructures, etc. [1][2][3][4][5][6] However, investigations in the area of natural fiber reinforced composites have mainly focused on random discontinuous fiber composite system. 7 Because of the discontinuous nature and random organization, the short fiber web reinforced composites exhibit lower mechanical properties, 8 and they are not suitable for use in more structural components.…”

Section: Introductionmentioning

confidence: 99%

Effect of layering pattern on thermal and mechanical properties of lyocell/rayon fabric reinforced textile composites

Suresh¹,

Thiruchitrambalam²,

Shanmugam³

2016

Journal of Reinforced Plastics and Composites

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The influence of different layering pattern on the thermal and mechanical properties of the hybrid lyocell/rayon woven fabric reinforced polyester composites is demonstrated in this research work. The effect of different layering pattern was studied and characterized with tensile, open hole tensile, flexural, and impact testing. Composites manufacture with rayon/rayon/lyocell pattern reinforcement has the best tensile and flexural properties. The tensile and flexural strength increased by 36.5% and 43.79%, respectively, with reference to neat resin. It is also noted that the tensile modulus reduced by 31.1% when compared to neat resin. This represents an increase of material ductility in comparison with neat resin. It is observed that placing of high strength lyocell fabric at the extreme layer as reinforcement would result in enhanced properties. In case of rayon/lyocell/rayon hybrid tensile composites it can be seen that there is only 8% increase in tensile properties in comparison with neat resin due to rayon fabric placed as a skin rather than core. A negative effect of 6–26% reduced tensile strength was observed for the open hole (6 mm diameter) samples of all pattern of textile composites. This was due to fiber and inter fiber (matrix) fracture. A more detailed microfractography analysis was used to determine the crack growth direction and initiation. While in impact properties the lyocell/lyocell/lyocell pattern reinforcement showed the best impact strength of 3.36 kJ/m2 compared to rayon/rayon/rayon and other tri-layer composites. Thermal analysis showed higher thermal stability for the rayon/rayon/lyocell pattern reinforcement.

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Mechanical Behavior and Fracture Mechanism of Thermoplastic Composites with Commingled Yarn

Cited by 19 publications

References 1 publication

Study on mechanical properties of unidirectional continuous carbon fiber‐reinforced PEEK composites fabricated by the wrapped yarn method

Study on mechanical properties of unidirectional continuous carbon fiber‐reinforced PEEK composites fabricated by the wrapped yarn method

High performance thermoplastic composite from flat knitted multi-layer textile preform using hybrid yarn

Effect of layering pattern on thermal and mechanical properties of lyocell/rayon fabric reinforced textile composites

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